I disagree. I think the actual play, while not necessarily revolutionary or anything, does a great job at depicting the way in which American culture often has no place for people like Billie Holliday once they become "difficult" and not particularly respectable. The tension between Billie's way of telling the stories (her jokes, her nonchalant attitude about some really awful things that were going on in her life) and the actual content of what she's saying is devastating and I'd even say incisive. Yes, Audra's performance is a wonder, easily one of the best I expect to ever see (the moment that will always stay with me was watching her move her back after she comes back from her "break," to be able to use your body like that is simply astonishing). But the performance wouldn't be there if she didn't have a script to support the great work she's doing. She absolutely elevates the play, but I think it's misguided to say the play is trivial.
"Some people can thrive and bloom living life in a living room, that's perfect for some people of one hundred and five. But I at least gotta try, when I think of all the sights that I gotta see, all the places I gotta play, all the things that I gotta be at"